Product Country Restriction

This module adds a new "Product Embargoes" area where you create restrictions. Each restriction targets one or more countries and/or country groups, and contains items that say which products are affected.

• Rules can apply globally (all products), to a product category (including sub-categories), to a specific product template (and all its variants), or to a single product variant.
• Each item can have a start and end date, so a restriction only applies during that period. The system checks that the start date is not later than the end date.
• On the company, you choose a strategy: "Authorize" (all products are allowed except those matching a restriction) or "Restrict" (all products are blocked except those matching a rule).
• On a customer/supplier contact form, a "Country Restriction" field is available, defaulting from the company setting.
• On the country form, a smart button shows how many product country restrictions apply to that country and opens the filtered list.
• Restrictions are company-specific: users only see restrictions of their allowed companies.

The module touches product.country.restriction, product.country.restriction.item, product.country.restriction.rule, product.template, product.product, res.company, res.country and res.partner. It provides helper methods that other modules can call to check whether a product is restricted for a given country and date, and to build an explanatory message.